Dewey Area Traffic Calming Project 10 | 08 | 2013 SAN - - PowerPoint PPT Presentation

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Dewey Area Traffic Calming Project 10 | 08 | 2013 SAN - - PowerPoint PPT Presentation

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SFMTA Municipal Transportation Agency Image: Crosswalk of California Street and Grant Avenue Dewey Area Traffic Calming Project 10 | 08 | 2013 SAN FRANCISCO, CALIFORNIA Tonights Agenda Introductions Project Recap 10 min

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Dewey Area Traffic Calming Project

10 | 08 | 2013 SAN FRANCISCO, CALIFORNIA

SFMTA Municipal Transportation Agency Image: Crosswalk of California Street and Grant Avenue

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Tonight’s Agenda

Introductions Project Recap ––10 min

  • Traffic Calming
  • Project Background

Project Update ––45 min

  • Discuss Traffic Calming Proposals

Next Steps––5 min Questions and Answers

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Traffic Calming

Combination of self-enforcing physical measures to improve safety on the streets Objectives:

  • Reduce speeding and cut though
  • Improve pedestrian/bike safety and access
  • Increase driver awareness
  • Prevent shifting the problem
  • Enhance aesthetics
  • Maintain access

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Higher Speeds = Difficulty Stopping

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Higher Speeds = Severe Injuries or Death

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Improve Aesthetics/Driver Awareness

Without Traffic Calming (Richmond District)

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Improve Aesthetics/Driver Awareness

With Traffic Calming (Duboce Triangle)

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STOP Signs vs. Traffic Calming

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Application Process

  • Application submitted

by residents

  • Analysis to determine

acceptance or rejection

  • Accepted projects ranked
  • Highest ranking projects

selected

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Project Development Process

  • Project Kick-Off –invited Residents, Neighborhood

Groups, Supervisors, and SFPD

  • Identify Problem Areas/Concerns
  • Draft Designs
  • Follow-Up Meetings –discuss various options and

associated trade-offs

  • Finalize Plan (we are here)
  • Legislation/Balloting
  • Determination of Funding (may precede

legislation/balloting)

  • Implementation/Construction

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Dewey Traffic Calming Project Area

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Dewey Project History

  • Kick-off meetings -Summer 2011
  • Resident Surveys - Summer 2011 & Spring

2013

  • Project Update letter to residents- Spring

2013

  • Community Work Group convenes - Summer

2013

  • Draft proposals developed - Summer 2013
  • Dewey Area Proposal unveiled - Fall 2013

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Resident Survey Summary

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Considerations

  • Pedestrian generators
  • STOP sign patterns
  • Collision history
  • Visibility
  • Street grades
  • Transit Performance
  • Nearby projects
  • Truck Traffic
  • Cut Through Traffic

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Dewey Area Reported Injury Collisions

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Collisions by Time, Type and Cause

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Dewey Area Speed Data

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Nearby Traffic Calming Projects

West Portal School Safe Routes to School Project

  • Dewey Circle Improvements

– widen raised circle – Construct splitter islands to slow exit speeds

  • Granville bulb-outs
  • Claremont Speed Cushion (was islands/Chicane)

– Between Allston and Granville Currently in Design Construction coming soon

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West Portal SR2S project

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Dewey Area Traffic Calming Proposals

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Proposed Areawide Measures

Methods Planned to Discourage Speeding and Cut- Through Traffic and Improve Safety

  • Speed Humps and Speed Cushions
  • Sidewalk Bulb Outs
  • Pedestrian/Median Islands
  • Traffic Circles
  • Raised Crosswalks

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Speed Humps and Cushions

  • Most effective in slowing

vehicle speeds

  • Relatively inexpensive
  • Cannot be used on hills

above 10% grade

  • Neutral aesthetics
  • May be added as needed

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Proposed Speed Humps and Cushions

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Early Implementation Speed Humps

  • Six speed humps

will be built with existing funding

  • Residents must

still approve each hump by vote

  • Estimated

construction: Spring 2014

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Raised Crosswalks

  • Create safer pedestrian crossings
  • Slow traffic/increase right of way compliance
  • No parking loss
  • Can create a “Gateway” to neighborhood

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Proposed Raised Crosswalks

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Pedestrian Refuge Median Islands

  • Reduce “wide-open” feel
  • Landscaping opportunity
  • Maintenance required

CROSS SECTION

  • Simplifies pedestrian crossings
  • Tightens roadway and slows turns
  • Often requires parking removal, but not here
  • Can create a “gateway” to the

neighborhood

» SIDE VIEW

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Pedestrian Island Locations

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Examples of Pedestrian Islands

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Sidewalk Bulb-outs

  • Shorten curb to curb

crossing distance

  • Increase pedestrian visibility
  • Tighten and slow vehicle

turns

  • Useful at Muni stops
  • Parking removal usually

needed

  • Can form a “Gateway” to

the neighborhood

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Proposed Bulb-out Locations

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Traffic Circles

  • Reduce vehicle conflict

points/Improve intersection safety

  • All traffic goes counter-

clockwise around the circle

  • Large vehicles may turn left

in front of circle when clear

  • STOP signs to remain
  • Landscaping opportunity
  • Requires maintenance

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Proposed Traffic Circles

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Traffic Circle: Dewey at Pacheco

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Next Steps

  • Finalize Plan –This winter
  • Obtain Major Funding –starting early 2014
  • Build Early Implementation Speed Humps –

Spring 2014

  • Address Operational Requests (15 MPH signs,

truck restrictions, crosswalks, “daylighting”, striping, etc.) – Winter/Spring 2013-14

  • Construct Remaining Phase 1 Traffic Calming

Measures –Beginning planned for Spring 2015

  • Collect “After” Speeds –6 months after

Implementation and/or repaving

  • Construct Phase 2 measures, decide if needed

from post-project speed/volume data

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Contact us

  • Project Manager:

– Nick Carr, 701-4468 – Nick.Carr@sfmta.com

  • Program E-mail: Livable.Streets@sfmta.com
  • Dewey Project on Traffic Calming Website:

https://www.sfmta.com/projects- planning/projects/dewey-area-traffic- calming-project

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